/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.protocol.influxdb.function;

import org.apache.iotdb.db.mpp.plan.expression.Expression;
import org.apache.iotdb.db.protocol.influxdb.constant.InfluxSqlConstant;
import org.apache.iotdb.db.protocol.influxdb.function.aggregator.*;
import org.apache.iotdb.db.protocol.influxdb.function.selector.InfluxFirstFunction;
import org.apache.iotdb.db.protocol.influxdb.function.selector.InfluxLastFunction;
import org.apache.iotdb.db.protocol.influxdb.function.selector.InfluxMaxFunction;
import org.apache.iotdb.db.protocol.influxdb.function.selector.InfluxMinFunction;

import java.util.List;

public class InfluxFunctionFactory {

    public static InfluxFunction generateFunction(
            String functionName, List<Expression> expressionList) {
        switch (functionName) {
            case InfluxSqlConstant.MAX:
                return new InfluxMaxFunction(expressionList);
            case InfluxSqlConstant.MIN:
                return new InfluxMinFunction(expressionList);
            case InfluxSqlConstant.LAST:
                return new InfluxLastFunction(expressionList);
            case InfluxSqlConstant.FIRST:
                return new InfluxFirstFunction(expressionList);
            case InfluxSqlConstant.COUNT:
                return new InfluxCountFunction(expressionList);
            case InfluxSqlConstant.MEAN:
                return new InfluxMeanFunction(expressionList);
            case InfluxSqlConstant.MEDIAN:
                return new InfluxMedianFunction(expressionList);
            case InfluxSqlConstant.MODE:
                return new InfluxModeFunction(expressionList);
            case InfluxSqlConstant.SPREAD:
                return new InfluxSpreadFunction(expressionList);
            case InfluxSqlConstant.STDDEV:
                return new InfluxStddevFunction(expressionList);
            case InfluxSqlConstant.SUM:
                return new InfluxSumFunction(expressionList);
            default:
                throw new IllegalArgumentException("not support aggregation name:" + functionName);
        }
    }
}
